Schematics

1 2
Y2
24M 10PPM 9PF
MAKE MAKE1
-
+
MIC1
LED1
B
R6
1K
1 2
C13
1
SHDN
2
VREP
3
IN+
4
IN-
5
OUT-
6
VCC
7
GND
8
OUT+
U5 8002
8002
R13
100K
C1 4
10 5
R1
10K
C1 6
68 3
R2 3
1K
LED2
1
CHG
2
GND
3
VBAT
4
VBUS
5
NC
U2
4054
R2 4
3K3
C1 0
10 6
MAKE2 MAKE3
1 4
2
3
KEY1
1 4
2
3
KEY2
1 4
2
3
KEY3
1 4
2
3
KEY4
1 4
2
3
KEY5
DAT1CLK1
MAKE4MAKE5
MAKE6
MAKE7
DAT2
DAT3
R2 0
6.8K
C2 8
22 4
R10
47k
ANT4
C1
10 2
C2
10 4
C5
10 5
C6
10 5
C7
10 4
C8
10 5
1
PC5/ SD1CLK
2
PC4/ SD1CMD/ ADC4
3
USBDM/ PC3/ SD1DAT/ ADC10
4
USBDP/ PA4/ AUX1R/ADC1
5
PA0/ MIC/PA3/ AUX1L/ADC0
6
DACL
7
DACVDD
8
VCOM
9
VSSIO
10
VDDIO
20
BT_OSCO
19
BT_OSCI
18
FMIP
17
BT_RF
16
BT_AVDD
15
ADC12/PR2
14
ADC12/PR1
13
RTCVDD
12
VBAT
11
PWMH2H/ ADC9/AUX0R/ PB5
U1
AC6928B
C3
10 4
C4
10 6
1
B
2
E
3
C
Q2
R5
100K
R4
1K
DAT4
DAT5
XO_N XO_P
BTANT
BTLED
VBAT
DACL
VBAT
ADKEY
VBAT
KEY1
KEY2
KEY3
KEY4
MIC_IN
DACVDD
KEY1
KEY2
KEY3
MIC_IN
BTLED
DACL
MUTE
ADKEY
BTANT
XO_N
XO_P
DACVDD
VCOM
VDDIO
KEY4
BT_AVDD
VBAT
FMIP
MUTE